They are, which makes the carriers "primary users" of those bands. As an unlicensed user, you may still legally transmit on these bands as long as your transmis

They are, which makes the carriers "primary users" of those bands. As an unlicensed user, you may still legally transmit on these bands as long as your transmissions are limited to a small range and do not interfere with a primary user's use. This means that you must transmit at a low power, but exactly how low depends on the band.